Someone (sorry, I've forgot who), told me to use NetPIPE to test the BTL layer.
Ok, I used it, but now I need some parallel applications that uses openmpi.
NetPIPE uses a ping-pong test between 2 machines to evaluate its test.

If anybody could send me an application that uses openmpi,
I can return with the results after its execution.

Why this? I need to compare the execution time just changing the BTL protocol.

Here I have a cluster with 16 machines (Athlon 1.2 128RAM with
100Mbits ethernet and a 1Giga Switch), using openmpi-1.0 stable (with
modifications that include LLC BTL [ I plan to release my code in a
website as soon as I have the results and the analysis done. ].